<template>
  <div class="login-container">
    <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" auto-complete="on" label-position="left">

      <div class="title-container">
        <h3 class="title">智行企业组织管理平台</h3>
      </div>
      
      <!-- 未登录提示信息 -->
      <div v-if="showLoginTip" class="login-tip">
        <el-alert
          title="请先登录"
          type="warning"
          show-icon
          :closable="false"
          center
        >
        </el-alert>
      </div>

      <el-form-item prop="username">
        <span class="svg-container">
          <svg-icon icon-class="user" />
        </span>
        <el-input
          ref="username"
          v-model="loginForm.username"
          placeholder="Username"
          name="username"
          type="text"
          tabindex="1"
          auto-complete="on"
        />
      </el-form-item>

      <el-form-item prop="password">
        <span class="svg-container">
          <svg-icon icon-class="password" />
        </span>
        <el-input
          :key="passwordType"
          ref="password"
          v-model="loginForm.password"
          :type="passwordType"
          placeholder="Password"
          name="password"
          tabindex="2"
          auto-complete="on"
          @keyup.enter.native="handleLogin"
        />
        <span class="show-pwd" @click="showPwd">
          <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'" />
        </span>
      </el-form-item>

      <el-button :loading="loading" type="primary" style="width:100%;margin-bottom:30px;" @click.native.prevent="handleLogin">登录</el-button>
      <el-button plain style="width:100%;margin-bottom:30px;" @click.native.prevent="handleRegister">注册</el-button>
    </el-form>
  </div>
</template>

<script>
import { validUsername } from '@/utils/validate'
import { login } from '@/api/user'
import { setToken } from '@/utils/auth'
export default {
  name: 'Login',
  data() {
    //用户名校验规则
    const validateUsername = (rule, value, callback) => {
      if (!validUsername(value)) {
        callback(new Error('请输入正确的用户名'))
      } else {
        callback()
      }
    }

    //用户名校验规则
    const validatePassword = (rule, value, callback) => {
      if (value.length < 6) {
        callback(new Error('密码长度至少为6位'))
      } else {
        callback()
      }
    }

    //数据模型
    return {
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      loginRules: {
        username: [{ required: true, trigger: 'blur', validator: validateUsername }],
        password: [{ required: true, trigger: 'blur', validator: validatePassword }]
      },
      loading: false,
      passwordType: 'password',
      redirect: undefined,
      showLoginTip: false // 控制未登录提示的显示
    }
  },
  
  watch: {
    $route: {
      handler: function(route) {
        this.redirect = route.query && route.query.redirect
        this.showLoginTip = !!this.redirect // 如果有redirect参数，说明是未登录重定向过来的，显示提示
      },
      immediate: true
    }
  },

  methods: {
    handleRegister() {
      this.$router.push('/register'); // 跳转到注册页面
    },
    //展示密码
    showPwd() {
      if (this.passwordType === 'password') {
        this.passwordType = ''
      } else {
        this.passwordType = 'password'
      }
      this.$nextTick(() => {
        this.$refs.password.focus()
      })
    },

    handleLogin() {
      this.$refs.loginForm.validate(valid => {
        if (valid) {
          this.loading = true

          // 调用登录后端接口
          login(this.loginForm).then((result) => {
            console.log('登录接口返回数据:', result)
            
            // 检查返回数据结构
            if (result.data && result.data.code === 1) {
              const responseData = result.data.data;
              
              // 获取token
              if (responseData && responseData.token) {
                const token = responseData.token;
                
                // 保存token和用户信息
                setToken(token);
                localStorage.setItem('username', responseData.username || this.loginForm.username);
                localStorage.setItem('userId', responseData.userId);
                
                // 显示登录成功消息
                this.$message({
                  message: '登录成功',
                  type: 'success',
                  duration: 2000
                });
                
                // 登录成功后的跳转处理
                const redirectPath = this.redirect || '/dashboard';
                this.$router.push(redirectPath);
              } else {
                this.$message.error('服务器返回的数据格式不正确');
                this.loading = false;
              }
            } else {
              this.$message.error(result.data.msg || '登录失败');
              this.loading = false;
            }
          }).catch(error => {
            console.error('登录异常:', error);
            this.$message.error('登录过程中发生错误，请检查网络或联系管理员');
            this.loading = false;
          });
        } else {
          console.log('表单验证失败')
          return false
        }
      })
    }
  }
}
</script>

<style lang="scss">
/* 修复input 背景不协调 和光标变色 */
/* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

$bg:#283443;
$light_gray:#fff;
$cursor: #fff;

@supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
  .login-container .el-input input {
    color: $cursor;
  }
}

/* reset element-ui css */
.login-container {
  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;

    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      caret-color: $cursor;

      &:-webkit-autofill {
        box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: $cursor !important;
      }
    }
  }

  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }
}
</style>

<style lang="scss" scoped>
$bg:#2d3a4b;
$dark_gray:#889aa4;
$light_gray:#eee;

.login-container {
  min-height: 100%;
  width: 100%;
  background-color: $bg;
  overflow: hidden;

  .login-form {
    position: relative;
    width: 520px;
    max-width: 100%;
    padding: 160px 35px 0;
    margin: 0 auto;
    overflow: hidden;
  }
  
  .login-tip {
    margin-bottom: 20px;
  }

  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;

    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }

  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }

  .title-container {
    position: relative;

    .title {
      font-size: 26px;
      color: $light_gray;
      margin: 0px auto 40px auto;
      text-align: center;
      font-weight: bold;
      font-family: '楷体';
    }
  }

  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }
}
</style>
